You can make this a little more terse:

```ruby
  def populate_output(output, prior_result)
    result = {
      label: prior_result[:label] || default_label(prior_result),
      benchmark: @benchmark_config['benchmark'],
      platform: @platform,
      run_options:  @benchmark_config['run_options'],
      input: @benchmark_config['platformspec'][@platform]['input'],
      output: output,
      hadoop_jar: @benchmark_config['platformspec'][@platform]['hadoop_jar'].split('/')[-1],
      node_type: prior_result['node_type'],
      num_nodes: prior_result['hadoop_slaves'],
      jobflow_id: prior_result['jobflow_id'],
      job_num: @parser.job_num,
      application_num: @parser.application_num
    }
  end
```